5/3 divied by 7 i need to know please help if you know

What does x = in this equation x+3+2x=x+5

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c =